1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * https://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.commons.io.output;
18
19 import static org.junit.jupiter.api.Assertions.assertThrows;
20
21 import java.io.IOException;
22
23 import org.junit.jupiter.api.Test;
24
25 /**
26 * Tests {@link NullAppendable}.
27 */
28 class NullAppendableTest {
29
30 @Test
31 void testNull() throws IOException {
32 final Appendable appendable = NullAppendable.INSTANCE;
33 appendable.append('a');
34 appendable.append("A");
35 appendable.append("A", 0, 1);
36 appendable.append(null, 0, 1);
37 // Check argument validation
38 final CharSequence csq = "ABCDE";
39 assertThrows(IndexOutOfBoundsException.class, () -> appendable.append(csq, -1, 0));
40 assertThrows(IndexOutOfBoundsException.class, () -> appendable.append(csq, 0, -1));
41 assertThrows(IndexOutOfBoundsException.class, () -> appendable.append(csq, 1, 0));
42 assertThrows(IndexOutOfBoundsException.class, () -> appendable.append(csq, 0, 6));
43 }
44
45 }